% slitherlink 344 by Hirofumi Fujiwara, http://www.janko.at/Raetsel/Slitherlink/344.a.htm
slitherlink
hard-
20 16
01..13.2..1.3.1.3..1
...31.3.2......10..1
.1...0...31.31...12.
..33..2.0..3..3....1
312.....1.1..31..11.
..1.20.2..3.1..0..1.
...2....3.1......1.2
30111.1..0..13.3..30
....3.10..3......0.1
.2.1.1.3...3.03.....
1...3112.1..1.3.13..
..2.....33..32..3103
.13.........1.....12
2..3.3....1...1.1...
11.10.1.31..32...32.
.3....3.13.1...3.0.1
